72340464
Oct 13, 1969
Jan 25, 1972
NATURAL AND SYNTHETIC RESINS FOR USE IN THE INDUSTRIAL ARTS; FOUNDRY PRODUCTS-NAMELY, CORE WASHES, [ CLAYS, ] FOUNDRY PARTINGS, FOUNDRY SAND, FOUNDRY FLOUR, SAND STABILIZERS, FACINGS, AND CORE PASTE; BITUMINOUS PRODUCTS INCLUDING PITCH AND ASPHALT
Chemicals